Apparatus

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sensors Mode-S transponder

39CF03

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HTYD · AIRBUS A-350-900

Hex
39CF03
Octal
16347403
Decimal
3,788,547
Country
FR
Tail
F-HTYD
Type
A359
No current signal · last broadcast 1h ago
Flights observed
185
Distinct callsigns
20
Country
FR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 39CF03.

Country allocation

The ICAO 24-bit address 39CF03 falls within the block assigned to France (FR) by ICAO Annex 10, Volume III. Every aircraft registered in France receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
AFR435 - 17 2026-06-26
AFR407 - 11 2026-06-28
AFR436 - 10 2026-06-24
AFR406 - 7 2026-06-27
AFR194 Air France 6 2026-06-01
AFR52X - 5 2026-07-08
AFR191 Air France 5 2026-06-01
AFR75K - 4 2026-07-12
AFR491 - 4 2026-06-16
AFR465 - 4 2026-07-13
AFR431 Air France 4 2026-05-09
AFR416 - 4 2026-07-14
AFR348F Air France 4 2026-06-25
AFR074 - 4 2026-07-12
AFR579 - 3 2026-06-20
AFR53X - 3 2026-07-09
AFR415 - 3 2026-07-09
AFR349 Air France 3 2026-06-26
AFR264 Air France 3 2026-04-18
AFR178 - 3 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFR416 - Jul 14, 12:10 UTCJul 14, 12:45 UTC35m
2026-07-13 AFR465 - Jul 13, 10:50 UTCJul 14, 06:00 UTC19h 10m
2026-07-13 AFR465 - Jul 13, 09:05 UTCJul 14, 06:00 UTC20h 55m
2026-07-12 AFR75K - Jul 12, 22:35 UTCJul 13, 05:45 UTC7h 10m
2026-07-12 AFR074 - Jul 12, 12:01 UTCJul 12, 19:50 UTC7h 50m
2026-07-11 AFR465 - Jul 11, 16:50 UTCJul 12, 05:45 UTC12h 55m
2026-07-11 AFR465 - Jul 11, 08:55 UTCJul 12, 05:45 UTC20h 50m
2026-07-10 AFR75K - Jul 10, 23:00 UTCJul 11, 06:01 UTC7h 0m
2026-07-10 AFR074 - Jul 10, 11:45 UTCJul 10, 20:05 UTC8h 20m
2026-07-09 AFR415 FOR → CDG Jul 9, 23:00 UTCJul 10, 07:05 UTC8h 5m
2026-07-09 AFR416 - Jul 9, 12:20 UTCJul 9, 20:45 UTC8h 25m
2026-07-09 AFR53X IAD → CDG Jul 9, 01:55 UTCJul 9, 08:55 UTC7h 0m
2026-07-08 AFR52X - Jul 8, 15:35 UTCJul 8, 23:05 UTC7h 30m
2026-07-08 AFR11E - Jul 8, 05:20 UTCJul 8, 11:55 UTC6h 35m
2026-07-07 AFR012 CDG → JFK Jul 7, 19:05 UTCJul 8, 02:15 UTC7h 10m
2026-07-05 AFR75K RDU → CDG Jul 5, 22:35 UTCJul 6, 05:30 UTC6h 55m
2026-07-05 AFR074 - Jul 5, 11:25 UTCJul 5, 19:30 UTC8h 5m
2026-07-04 AFR337P SEA → CDG Jul 4, 23:00 UTCJul 5, 08:05 UTC9h 5m
2026-07-04 AFR338 - Jul 4, 09:20 UTCJul 4, 18:50 UTC9h 30m
2026-07-03 AFR75K - Jul 3, 22:55 UTCJul 4, 06:15 UTC7h 20m
2026-07-03 AFR074 - Jul 3, 12:15 UTCJul 3, 20:15 UTC8h 0m
2026-07-02 AFR934 - Jul 2, 09:40 UTCJul 2, 13:10 UTC3h 30m
2026-07-01 AFR375G - Jul 1, 20:30 UTCJul 2, 05:15 UTC8h 45m
2026-07-01 AFR374F - Jul 1, 09:10 UTCJul 1, 18:30 UTC9h 20m
2026-06-30 AFR333F BOS → CDG Jun 30, 21:30 UTCJul 1, 03:40 UTC6h 10m
2026-06-30 AFR334M - Jun 30, 11:50 UTCJun 30, 18:40 UTC6h 50m
2026-06-28 AFR407 - Jun 28, 16:55 UTCJun 29, 03:44 UTC10h 50m
2026-06-28 AFR407 - Jun 28, 14:45 UTCJun 28, 14:54 UTC10m
2026-06-27 AFR406 - Jun 27, 22:29 UTCJun 28, 09:05 UTC10h 35m
2026-06-26 AFR435 - Jun 26, 23:30 UTCJun 27, 13:55 UTC14h 25m
2026-06-26 AFR435 - Jun 26, 16:49 UTCJun 27, 13:55 UTC21h 5m
2026-06-26 AFR435 - Jun 26, 15:39 UTCJun 27, 13:55 UTC22h 15m
2026-06-26 AFR349 YUL → CDG Jun 26, 02:44 UTCJun 26, 08:54 UTC6h 10m
2026-06-25 AFR348F CDG → YUL Jun 25, 23:05 UTCJun 25, 23:59 UTC55m
2026-06-25 AFR348F CDG → YUL Jun 25, 17:09 UTCJun 25, 22:59 UTC5h 50m
2026-06-25 AFR435 - Jun 25, 03:54 UTCJun 25, 12:54 UTC9h 0m
2026-06-24 AFR436 - Jun 24, 14:20 UTCJun 24, 23:29 UTC9h 10m
2026-06-23 AFR578 - Jun 23, 16:29 UTCJun 24, 06:25 UTC13h 55m
2026-06-23 AFR435 - Jun 23, 04:39 UTCJun 23, 13:15 UTC8h 35m
2026-06-22 AFR436 - Jun 22, 15:10 UTCJun 23, 00:09 UTC9h 0m
2026-06-22 AFR53X IAD → CDG Jun 22, 01:44 UTCJun 22, 08:25 UTC6h 40m
2026-06-21 AFR52X - Jun 21, 15:34 UTCJun 21, 23:14 UTC7h 40m
2026-06-21 AFR179 - Jun 21, 01:45 UTCJun 21, 11:30 UTC9h 45m
2026-06-20 AFR178 - Jun 20, 11:40 UTCJun 20, 22:54 UTC11h 15m
2026-06-20 AFR579 - Jun 20, 05:09 UTCJun 20, 07:49 UTC2h 40m
2026-06-19 AFR578 - Jun 19, 16:39 UTCJun 20, 01:34 UTC8h 55m
2026-06-19 AFR349 YUL → CDG Jun 19, 02:35 UTCJun 19, 08:50 UTC6h 15m
2026-06-18 AFR348F CDG → YUL Jun 18, 17:00 UTCJun 18, 23:50 UTC6h 50m
2026-06-18 AFR349 YUL → CDG Jun 18, 02:55 UTCJun 18, 09:10 UTC6h 15m
2026-06-17 AFR348F CDG → YUL Jun 17, 17:00 UTCJun 17, 23:40 UTC6h 40m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the F-HTYD page for operator, model, and routing details .

Mode-S 39CF03 frequently asked

What is Mode-S code 39CF03?
39CF03 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYD.
Where is Mode-S 39CF03 registered?
Mode-S code 39CF03 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF03 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF03, octal 16347403, decimal 3,788,547.
What flights does 39CF03 operate?
Mode-S 39CF03 has broadcast 20 distinct callsigns, including AFR435, AFR407, AFR436, AFR406, AFR194.